Thermostat.



PATENTED OCT. 2, 1906.

RE. AUSTIN. THERMOSTAT.

APPLIGATION FILED DEO.26.1905.

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WIT E55E5 7M EE UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Oct. 2, 1906.

Anplicatiou filed December 26,1905. Serial No. 293.193.

To all whom it may concern:

Be it known that I, FRANK E. AUsTiN, a citizen of the United States,residing at VVestbrook, in the county of Cumberland and State of Maine,have invented new and useful Improvements in Thermostats, of which thefollowing is a specification.

The object of my invention is to produce a thermostat which is certainto operate in a given temperature, that is simple and inexpensive toconstruct, and readily adapted for any use for which a thermostat isdeslrable.

In the drawings herewith accompanying and making a part of thisapplication, Figure 1 is a vertical section of my improved thermostat.Fig. 2 is a section of the same at right angles to the line on whichFig. 1 is taken, and Fig. 3 is a plan view.

In said drawings, A represents a base u 3011 which is mounted a housingB, in which is disposed a cross-head C, having the two electrodes D Dsecured thereto in any convenient manner, as by bolts E. Aspring-actuated circuit-closer G is held normally out of contact withsaidelectrodes by means of latch I-I, mounted on the housing by a pivotI, said latch being made in two parts united by a connection J of somematerial fusible at any desired temperature. Said latch is adapted whenin operative position to press down upon the spring-actuatedcircuit-closer G andhold it out of contact with the electrodes D D. Thebottom face of the latch has a beveled edge, as seen at K, adapted toengage the top M of the circuit-closer and by wedging action force itdownwardly to break the circuit when the latch is turned into engagementwith the end of the circuit-closer. My improved thermostat is designedto be used in giving signals of any kind, either sound, light, ormechanical. It may be operated automatically or manually.

It is apparent from the drawings and de scription that whenever thetemperature of the room in which the thermostat is situated risessufficiently to fuse the connection between the parts of the latchseparation takes place, that the end of the latch falls off and ermitsthe spring to lift the circuit-closer mto contact with the electrodes,thus ringing a bell, lighting a light, or operating a mechanical signal,as the case may be.

Having thus described my invention and its use, I claim 1.. A thermostatcomprising a suitable housing, electrodes, a spring-actuatedcircuit-closer having its upper end projecting normally above thehousing and a latch pivotally mounted on one end of said housing, itsother end being free, said latch comprising two parts united by afusible connection, said fusible connection when the latch is in normalposition being between the pivot-point and said circuit-closer.

2. A thermostat comprising a suitable housing, electrodes, aspring-actuated circuit-closer having its upper end projecting normallyabove the housing and a latch pivotally mounted on said housing, saidlatch comprising two parts united by a fusible connection and having itsbottom face beveled, said latch being adapted to be turned on its pivotinto and out of the path of the projecting end of the circuit-closer.

In testimony whereof I have signed this specification, in presence oftwo subscribing witnesses, this 19th day of December, 1905.

FRANK E. AUSTIN.

In presence of ELGIN C. VERRILL, MARION RICHARDS.

